﻿/* http://keith-wood.name/datepick.html
Date picker for jQuery v4.0.6.
Written by Keith Wood (kbwood{at}iinet.com.au) February 2010.
Dual licensed under the GPL (http://dev.jquery.com/browser/trunk/jquery/GPL-LICENSE.txt) and 
MIT (http://dev.jquery.com/browser/trunk/jquery/MIT-LICENSE.txt) licenses. 
Please attribute the author if you use it. */

(function($) { // Hide scope, no $ conflict

    /* Datepicker manager. */
    function Datepicker() {
        this._defaults = {
            pickerClass: '', // CSS class to add to this instance of the datepicker
            showOnFocus: true, // True for popup on focus, false for not
            showTrigger: null, // Element to be cloned for a trigger, null for none
            showAnim: 'show', // Name of jQuery animation for popup, '' for no animation
            showOptions: {}, // Options for enhanced animations
            showSpeed: 'normal', // Duration of display/closure
            popupContainer: null, // The element to which a popup calendar is added, null for body
            alignment: 'bottom', // Alignment of popup - with nominated corner of input:
            // 'top' or 'bottom' aligns depending on language direction,
            // 'topLeft', 'topRight', 'bottomLeft', 'bottomRight'
            fixedWeeks: false, // True to always show 6 weeks, false to only show as many as are needed
            firstDay: 0, // First day of the week, 0 = Sunday, 1 = Monday, ...
            calculateWeek: this.iso8601Week, // Calculate week of the year from a date, null for ISO8601
            monthsToShow: 1, // How many months to show, cols or [rows, cols]
            monthsOffset: 0, // How many months to offset the primary month by;
            // may be a function that takes the date and returns the offset
            monthsToStep: 1, // How many months to move when prev/next clicked
            monthsToJump: 12, // How many months to move when large prev/next clicked
            useMouseWheel: true, // True to use mousewheel if available, false to never use it
            changeMonth: true, // True to change month/year via drop-down, false for navigation only
            yearRange: 'c-10:c+10', // Range of years to show in drop-down: 'any' for direct text entry
            // or 'start:end', where start/end are '+-nn' for relative to today
            // or 'c+-nn' for relative to the currently selected date
            // or 'nnnn' for an absolute year
            shortYearCutoff: '+10', // Cutoff for two-digit year in the current century
            showOtherMonths: false, // True to show dates from other months, false to not show them
            selectOtherMonths: false, // True to allow selection of dates from other months too
            defaultDate: null, // Date to show if no other selected
            selectDefaultDate: false, // True to pre-select the default date if no other is chosen
            minDate: null, // The minimum selectable date
            maxDate: null, // The maximum selectable date
            dateFormat: 'mm/dd/yyyy', // Format for dates
            autoSize: false, // True to size the input field according to the date format
            rangeSelect: false, // Allows for selecting a date range on one date picker
            rangeSeparator: ' - ', // Text between two dates in a range
            multiSelect: 0, // Maximum number of selectable dates, zero for single select
            multiSeparator: ',', // Text between multiple dates
            onDate: null, // Callback as a date is added to the datepicker
            onShow: null, // Callback just before a datepicker is shown
            onChangeMonthYear: null, // Callback when a new month/year is selected
            onSelect: null, // Callback when a date is selected
            onClose: null, // Callback when a datepicker is closed
            altField: null, // Alternate field to update in synch with the datepicker
            altFormat: null, // Date format for alternate field, defaults to dateFormat
            constrainInput: true, // True to constrain typed input to dateFormat allowed characters
            commandsAsDateFormat: false, // True to apply formatDate to the command texts
            commands: this.commands // Command actions that may be added to a layout by name
        };
        this.regional = {
            '': { // US/English
                monthNames: ['January', 'February', 'March', 'April', 'May', 'June',
			'July', 'August', 'September', 'October', 'November', 'December'],
                monthNamesShort: ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec'],
                dayNames: ['Sunday', 'Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday'],
                dayNamesShort: ['Sun', 'Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat'],
                dayNamesMin: ['Su', 'Mo', 'Tu', 'We', 'Th', 'Fr', 'Sa'],
                dateFormat: 'mm/dd/yyyy', // See options on formatDate
                firstDay: 0, // The first day of the week, Sun = 0, Mon = 1, ...
                renderer: this.defaultRenderer, // The rendering templates
                prevText: '&lt;Prev', // Text for the previous month command
                prevStatus: 'Show the previous month', // Status text for the previous month command
                prevJumpText: '&lt;&lt;', // Text for the previous year command
                prevJumpStatus: 'Show the previous year', // Status text for the previous year command
                nextText: 'Next&gt;', // Text for the next month command
                nextStatus: 'Show the next month', // Status text for the next month command
                nextJumpText: '&gt;&gt;', // Text for the next year command
                nextJumpStatus: 'Show the next year', // Status text for the next year command
                currentText: 'Current', // Text for the current month command
                currentStatus: 'Show the current month', // Status text for the current month command
                todayText: 'Today', // Text for the today's month command
                todayStatus: 'Show today\'s month', // Status text for the today's month command
                clearText: 'Clear', // Text for the clear command
                clearStatus: 'Clear all the dates', // Status text for the clear command
                closeText: 'Close', // Text for the close command
                closeStatus: 'Close the datepicker', // Status text for the close command
                yearStatus: 'Change the year', // Status text for year selection
                monthStatus: 'Change the month', // Status text for month selection
                weekText: 'Wk', // Text for week of the year column header
                weekStatus: 'Week of the year', // Status text for week of the year column header
                dayStatus: 'Select DD, M d, yyyy', // Status text for selectable days
                defaultStatus: 'Select a date', // Status text shown by default
                isRTL: false // True if language is right-to-left
}
            };
            $.extend(this._defaults, this.regional['']);
            this._disabled = [];
        }

        $.extend(Datepicker.prototype, {
            dataName: 'datepick',

            /* Class name added to elements to indicate already configured with datepicker. */
            markerClass: 'hasDatepick',

            _popupClass: 'datepick-popup', // Marker for popup division
            _triggerClass: 'datepick-trigger', // Marker for trigger element
            _disableClass: 'datepick-disable', // Marker for disabled element
            _coverClass: 'datepick-cover', // Marker for iframe backing element
            _monthYearClass: 'datepick-month-year', // Marker for month/year inputs
            _curMonthClass: 'datepick-month-', // Marker for current month/year
            _anyYearClass: 'datepick-any-year', // Marker for year direct input
            _curDoWClass: 'datepick-dow-', // Marker for day of week

            commands: { // Command actions that may be added to a layout by name
                // name: { // The command name, use '{button:name}' or '{link:name}' in layouts
                //		text: '', // The field in the regional settings for the displayed text
                //		status: '', // The field in the regional settings for the status text
                //      // The keystroke to trigger the action
                //		keystroke: {keyCode: nn, ctrlKey: boolean, altKey: boolean, shiftKey: boolean},
                //		enabled: fn, // The function that indicates the command is enabled
                //		date: fn, // The function to get the date associated with this action
                //		action: fn} // The function that implements the action
                prev: { text: 'prevText', status: 'prevStatus', // Previous month
                    keystroke: { keyCode: 33 }, // Page up
                    enabled: function(inst) {
                        var minDate = inst.curMinDate();
                        return (!minDate || $.datepick.add($.datepick.day(
					$.datepick._applyMonthsOffset($.datepick.add($.datepick.newDate(inst.drawDate),
					1 - inst.get('monthsToStep'), 'm'), inst), 1), -1, 'd').
					getTime() >= minDate.getTime());
                    },
                    date: function(inst) {
                        return $.datepick.day($.datepick._applyMonthsOffset($.datepick.add(
					$.datepick.newDate(inst.drawDate), -inst.get('monthsToStep'), 'm'), inst), 1);
                    },
                    action: function(inst) {
                        $.datepick.changeMonth(this, -inst.get('monthsToStep'));
                    }
                },
                prevJump: { text: 'prevJumpText', status: 'prevJumpStatus', // Previous year
                    keystroke: { keyCode: 33, ctrlKey: true }, // Ctrl + Page up
                    enabled: function(inst) {
                        var minDate = inst.curMinDate();
                        return (!minDate || $.datepick.add($.datepick.day(
					$.datepick._applyMonthsOffset($.datepick.add($.datepick.newDate(inst.drawDate),
					1 - inst.get('monthsToJump'), 'm'), inst), 1), -1, 'd').
					getTime() >= minDate.getTime());
                    },
                    date: function(inst) {
                        return $.datepick.day($.datepick._applyMonthsOffset($.datepick.add(
					$.datepick.newDate(inst.drawDate), -inst.get('monthsToJump'), 'm'), inst), 1);
                    },
                    action: function(inst) {
                        $.datepick.changeMonth(this, -inst.get('monthsToJump'));
                    }
                },
                next: { text: 'nextText', status: 'nextStatus', // Next month
                    keystroke: { keyCode: 34 }, // Page down
                    enabled: function(inst) {
                        var maxDate = inst.get('maxDate');
                        return (!maxDate || $.datepick.day($.datepick._applyMonthsOffset($.datepick.add(
					$.datepick.newDate(inst.drawDate), inst.get('monthsToStep'), 'm'), inst), 1).
					getTime() <= maxDate.getTime());
                    },
                    date: function(inst) {
                        return $.datepick.day($.datepick._applyMonthsOffset($.datepick.add(
					$.datepick.newDate(inst.drawDate), inst.get('monthsToStep'), 'm'), inst), 1);
                    },
                    action: function(inst) {
                        $.datepick.changeMonth(this, inst.get('monthsToStep'));
                    }
                },
                nextJump: { text: 'nextJumpText', status: 'nextJumpStatus', // Next year
                    keystroke: { keyCode: 34, ctrlKey: true }, // Ctrl + Page down
                    enabled: function(inst) {
                        var maxDate = inst.get('maxDate');
                        return (!maxDate || $.datepick.day($.datepick._applyMonthsOffset($.datepick.add(
					$.datepick.newDate(inst.drawDate), inst.get('monthsToJump'), 'm'), inst), 1).
					getTime() <= maxDate.getTime());
                    },
                    date: function(inst) {
                        return $.datepick.day($.datepick._applyMonthsOffset($.datepick.add(
					$.datepick.newDate(inst.drawDate), inst.get('monthsToJump'), 'm'), inst), 1);
                    },
                    action: function(inst) {
                        $.datepick.changeMonth(this, inst.get('monthsToJump'));
                    }
                },
                current: { text: 'currentText', status: 'currentStatus', // Current month
                    keystroke: { keyCode: 36, ctrlKey: true }, // Ctrl + Home
                    enabled: function(inst) {
                        var minDate = inst.curMinDate();
                        var maxDate = inst.get('maxDate');
                        var curDate = inst.selectedDates[0] || $.datepick.today();
                        return (!minDate || curDate.getTime() >= minDate.getTime()) &&
					(!maxDate || curDate.getTime() <= maxDate.getTime());
                    },
                    date: function(inst) {
                        return inst.selectedDates[0] || $.datepick.today();
                    },
                    action: function(inst) {
                        var curDate = inst.selectedDates[0] || $.datepick.today();
                        $.datepick.showMonth(this, curDate.getFullYear(), curDate.getMonth() + 1);
                    }
                },
                today: { text: 'todayText', status: 'todayStatus', // Today's month
                    keystroke: { keyCode: 36, ctrlKey: true }, // Ctrl + Home
                    enabled: function(inst) {
                        var minDate = inst.curMinDate();
                        var maxDate = inst.get('maxDate');
                        return (!minDate || $.datepick.today().getTime() >= minDate.getTime()) &&
					(!maxDate || $.datepick.today().getTime() <= maxDate.getTime());
                    },
                    date: function(inst) { return $.datepick.today(); },
                    action: function(inst) { $.datepick.showMonth(this); }
                },
                clear: { text: 'clearText', status: 'clearStatus', // Clear the datepicker
                    keystroke: { keyCode: 35, ctrlKey: true }, // Ctrl + End
                    enabled: function(inst) { return true; },
                    date: function(inst) { return null; },
                    action: function(inst) { $.datepick.clear(this); }
                },
                close: { text: 'closeText', status: 'closeStatus', // Close the datepicker
                    keystroke: { keyCode: 27 }, // Escape
                    enabled: function(inst) { return true; },
                    date: function(inst) { return null; },
                    action: function(inst) { $.datepick.hide(this); }
                },
                prevWeek: { text: 'prevWeekText', status: 'prevWeekStatus', // Previous week
                    keystroke: { keyCode: 38, ctrlKey: true }, // Ctrl + Up
                    enabled: function(inst) {
                        var minDate = inst.curMinDate();
                        return (!minDate || $.datepick.add($.datepick.newDate(inst.drawDate), -7, 'd').
					getTime() >= minDate.getTime());
                    },
                    date: function(inst) { return $.datepick.add($.datepick.newDate(inst.drawDate), -7, 'd'); },
                    action: function(inst) { $.datepick.changeDay(this, -7); }
                },
                prevDay: { text: 'prevDayText', status: 'prevDayStatus', // Previous day
                    keystroke: { keyCode: 37, ctrlKey: true }, // Ctrl + Left
                    enabled: function(inst) {
                        var minDate = inst.curMinDate();
                        return (!minDate || $.datepick.add($.datepick.newDate(inst.drawDate), -1, 'd').
					getTime() >= minDate.getTime());
                    },
                    date: function(inst) { return $.datepick.add($.datepick.newDate(inst.drawDate), -1, 'd'); },
                    action: function(inst) { $.datepick.changeDay(this, -1); }
                },
                nextDay: { text: 'nextDayText', status: 'nextDayStatus', // Next day
                    keystroke: { keyCode: 39, ctrlKey: true }, // Ctrl + Right
                    enabled: function(inst) {
                        var maxDate = inst.get('maxDate');
                        return (!maxDate || $.datepick.add($.datepick.newDate(inst.drawDate), 1, 'd').
					getTime() <= maxDate.getTime());
                    },
                    date: function(inst) { return $.datepick.add($.datepick.newDate(inst.drawDate), 1, 'd'); },
                    action: function(inst) { $.datepick.changeDay(this, 1); }
                },
                nextWeek: { text: 'nextWeekText', status: 'nextWeekStatus', // Next week
                    keystroke: { keyCode: 40, ctrlKey: true }, // Ctrl + Down
                    enabled: function(inst) {
                        var maxDate = inst.get('maxDate');
                        return (!maxDate || $.datepick.add($.datepick.newDate(inst.drawDate), 7, 'd').
					getTime() <= maxDate.getTime());
                    },
                    date: function(inst) { return $.datepick.add($.datepick.newDate(inst.drawDate), 7, 'd'); },
                    action: function(inst) { $.datepick.changeDay(this, 7); }
                }
            },

            /* Default template for generating a datepicker. */
            defaultRenderer: {
                // Anywhere: '{l10n:name}' to insert localised value for name,
                // '{link:name}' to insert a link trigger for command name,
                // '{button:name}' to insert a button trigger for command name,
                // '{popup:start}...{popup:end}' to mark a section for inclusion in a popup datepicker only,
                // '{inline:start}...{inline:end}' to mark a section for inclusion in an inline datepicker only
                // Overall structure: '{months}' to insert calendar months
                picker: '<div class="datepick">' +
		'<div class="datepick-nav">{link:prev}{link:today}{link:next}</div>{months}' +
		'{popup:start}<div class="datepick-ctrl">{link:clear}{link:close}</div>{popup:end}' +
		'<div class="datepick-clear-fix"></div></div>',
                // One row of months: '{months}' to insert calendar months
                monthRow: '<div class="datepick-month-row">{months}</div>',
                // A single month: '{monthHeader:dateFormat}' to insert the month header -
                // dateFormat is optional and defaults to 'MM yyyy',
                // '{weekHeader}' to insert a week header, '{weeks}' to insert the month's weeks
                month: '<div class="datepick-month"><div class="datepick-month-header">{monthHeader}</div>' +
		'<table><thead>{weekHeader}</thead><tbody>{weeks}</tbody></table></div>',
                // A week header: '{days}' to insert individual day names
                weekHeader: '<tr>{days}</tr>',
                // Individual day header: '{day}' to insert day name
                dayHeader: '<th>{day}</th>',
                // One week of the month: '{days}' to insert the week's days, '{weekOfYear}' to insert week of year
                week: '<tr>{days}</tr>',
                // An individual day: '{day}' to insert day value
                day: '<td>{day}</td>',
                // jQuery selector, relative to picker, for a single month
                monthSelector: '.datepick-month',
                // jQuery selector, relative to picker, for individual days
                daySelector: 'td',
                // Class for right-to-left (RTL) languages
                rtlClass: 'datepick-rtl',
                // Class for multi-month datepickers
                multiClass: 'datepick-multi',
                // Class for selectable dates
                defaultClass: '',
                // Class for currently selected dates
                selectedClass: 'datepick-selected',
                // Class for highlighted dates
                highlightedClass: 'datepick-highlight',
                // Class for today
                todayClass: 'datepick-today',
                // Class for days from other months
                otherMonthClass: 'datepick-other-month',
                // Class for days on weekends
                weekendClass: 'datepick-weekend',
                // Class prefix for commands
                commandClass: 'datepick-cmd',
                // Extra class(es) for commands that are buttons
                commandButtonClass: '',
                // Extra class(es) for commands that are links
                commandLinkClass: '',
                // Class for disabled commands
                disabledClass: 'datepick-disabled'
            },

            /* Override the default settings for all datepicker instances.
            @param  settings  (object) the new settings to use as defaults
            @return  (Datepicker) this object */
            setDefaults: function(settings) {
                $.extend(this._defaults, settings || {});
                return this;
            },

            _ticksTo1970: (((1970 - 1) * 365 + Math.floor(1970 / 4) - Math.floor(1970 / 100) +
		Math.floor(1970 / 400)) * 24 * 60 * 60 * 10000000),
            _msPerDay: 24 * 60 * 60 * 1000,

            ATOM: 'yyyy-mm-dd', // RFC 3339/ISO 8601
            COOKIE: 'D, dd M yyyy',
            FULL: 'DD, MM d, yyyy',
            ISO_8601: 'yyyy-mm-dd',
            JULIAN: 'J',
            RFC_822: 'D, d M yy',
            RFC_850: 'DD, dd-M-yy',
            RFC_1036: 'D, d M yy',
            RFC_1123: 'D, d M yyyy',
            RFC_2822: 'D, d M yyyy',
            RSS: 'D, d M yy', // RFC 822
            TICKS: '!',
            TIMESTAMP: '@',
            W3C: 'yyyy-mm-dd', // ISO 8601

            /* Format a date object into a string value.
            The format can be combinations of the following:
            d  - day of month (no leading zero)
            dd - day of month (two digit)
            o  - day of year (no leading zeros)
            oo - day of year (three digit)
            D  - day name short
            DD - day name long
            w  - week of year (no leading zero)
            ww - week of year (two digit)
            m  - month of year (no leading zero)
            mm - month of year (two digit)
            M  - month name short
            MM - month name long
            yy - year (two digit)
            yyyy - year (four digit)
            @  - Unix timestamp (s since 01/01/1970)
            !  - Windows ticks (100ns since 01/01/0001)
            '...' - literal text
            '' - single quote
            @param  format    (string) the desired format of the date (optional, default datepicker format)
            @param  date      (Date) the date value to format
            @param  settings  (object) attributes include:
            dayNamesShort    (string[]) abbreviated names of the days from Sunday (optional)
            dayNames         (string[]) names of the days from Sunday (optional)
            monthNamesShort  (string[]) abbreviated names of the months (optional)
            monthNames       (string[]) names of the months (optional)
            calculateWeek    (function) function that determines week of the year (optional)
            @return  (string) the date in the above format */
            formatDate: function(format, date, settings) {
                if (typeof format != 'string') {
                    settings = date;
                    date = format;
                    format = '';
                }
                if (!date) {
                    return '';
                }
                format = format || this._defaults.dateFormat;
                settings = settings || {};
                var dayNamesShort = settings.dayNamesShort || this._defaults.dayNamesShort;
                var dayNames = settings.dayNames || this._defaults.dayNames;
                var monthNamesShort = settings.monthNamesShort || this._defaults.monthNamesShort;
                var monthNames = settings.monthNames || this._defaults.monthNames;
                var calculateWeek = settings.calculateWeek || this._defaults.calculateWeek;
                // Check whether a format character is doubled
                var doubled = function(match, step) {
                    var matches = 1;
                    while (iFormat + matches < format.length && format.charAt(iFormat + matches) == match) {
                        matches++;
                    }
                    iFormat += matches - 1;
                    return Math.floor(matches / (step || 1)) > 1;
                };
                // Format a number, with leading zeroes if necessary
                var formatNumber = function(match, value, len, step) {
                    var num = '' + value;
                    if (doubled(match, step)) {
                        while (num.length < len) {
                            num = '0' + num;
                        }
                    }
                    return num;
                };
                // Format a name, short or long as requested
                var formatName = function(match, value, shortNames, longNames) {
                    return (doubled(match) ? longNames[value] : shortNames[value]);
                };
                var output = '';
                var literal = false;
                for (var iFormat = 0; iFormat < format.length; iFormat++) {
                    if (literal) {
                        if (format.charAt(iFormat) == "'" && !doubled("'")) {
                            literal = false;
                        }
                        else {
                            output += format.charAt(iFormat);
                        }
                    }
                    else {
                        switch (format.charAt(iFormat)) {
                            case 'd': output += formatNumber('d', date.getDate(), 2); break;
                            case 'D': output += formatName('D', date.getDay(),
						dayNamesShort, dayNames); break;
                            case 'o': output += formatNumber('o', this.dayOfYear(date), 3); break;
                            case 'w': output += formatNumber('w', calculateWeek(date), 2); break;
                            case 'm': output += formatNumber('m', date.getMonth() + 1, 2); break;
                            case 'M': output += formatName('M', date.getMonth(),
						monthNamesShort, monthNames); break;
                            case 'y':
                                output += (doubled('y', 2) ? date.getFullYear() :
							(date.getFullYear() % 100 < 10 ? '0' : '') + date.getFullYear() % 100);
                                break;
                            case '@': output += Math.floor(date.getTime() / 1000); break;
                            case '!': output += date.getTime() * 10000 + this._ticksTo1970; break;
                            case "'":
                                if (doubled("'")) {
                                    output += "'";
                                }
                                else {
                                    literal = true;
                                }
                                break;
                            default:
                                output += format.charAt(iFormat);
                        }
                    }
                }
                return output;
            },

            /* Parse a string value into a date object.
            See formatDate for the possible formats, plus:
            * - ignore rest of string
            @param  format    (string) the expected format of the date ('' for default datepicker format)
            @param  value     (string) the date in the above format
            @param  settings  (object) attributes include:
            shortYearCutoff  (number) the cutoff year for determining the century (optional)
            dayNamesShort    (string[]) abbreviated names of the days from Sunday (optional)
            dayNames         (string[]) names of the days from Sunday (optional)
            monthNamesShort  (string[]) abbreviated names of the months (optional)
            monthNames       (string[]) names of the months (optional)
            @return  (Date) the extracted date value or null if value is blank
            @throws  errors if the format and/or value are missing,
            if the value doesn't match the format,
            or if the date is invalid */
            parseDate: function(format, value, settings) {
                if (value == null) {
                    throw 'Invalid arguments';
                }
                value = (typeof value == 'object' ? value.toString() : value + '');
                if (value == '') {
                    return null;
                }
                format = format || this._defaults.dateFormat;
                settings = settings || {};
                var shortYearCutoff = settings.shortYearCutoff || this._defaults.shortYearCutoff;
                shortYearCutoff = (typeof shortYearCutoff != 'string' ? shortYearCutoff :
			this.today().getFullYear() % 100 + parseInt(shortYearCutoff, 10));
                var dayNamesShort = settings.dayNamesShort || this._defaults.dayNamesShort;
                var dayNames = settings.dayNames || this._defaults.dayNames;
                var monthNamesShort = settings.monthNamesShort || this._defaults.monthNamesShort;
                var monthNames = settings.monthNames || this._defaults.monthNames;
                var year = -1;
                var month = -1;
                var day = -1;
                var doy = -1;
                var shortYear = false;
                var literal = false;
                // Check whether a format character is doubled
                var doubled = function(match, step) {
                    var matches = 1;
                    while (iFormat + matches < format.length && format.charAt(iFormat + matches) == match) {
                        matches++;
                    }
                    iFormat += matches - 1;
                    return Math.floor(matches / (step || 1)) > 1;
                };
                // Extract a number from the string value
                var getNumber = function(match, step) {
                    var isDoubled = doubled(match, step);
                    var size = [2, 3, isDoubled ? 4 : 2, 11, 20]['oy@!'.indexOf(match) + 1];
                    var digits = new RegExp('^-?\\d{1,' + size + '}');
                    var num = value.substring(iValue).match(digits);
                    if (!num) {
                        throw 'Missing number at position {0}'.replace(/\{0\}/, iValue);
                    }
                    iValue += num[0].length;
                    return parseInt(num[0], 10);
                };
                // Extract a name from the string value and convert to an index
                var getName = function(match, shortNames, longNames, step) {
                    var names = (doubled(match, step) ? longNames : shortNames);
                    for (var i = 0; i < names.length; i++) {
                        if (value.substr(iValue, names[i].length) == names[i]) {
                            iValue += names[i].length;
                            return i + 1;
                        }
                    }
                    throw 'Unknown name at position {0}'.replace(/\{0\}/, iValue);
                };
                // Confirm that a literal character matches the string value
                var checkLiteral = function() {
                    if (value.charAt(iValue) != format.charAt(iFormat)) {
                        throw 'Unexpected literal at position {0}'.replace(/\{0\}/, iValue);
                    }
                    iValue++;
                };
                var iValue = 0;
                for (var iFormat = 0; iFormat < format.length; iFormat++) {
                    if (literal) {
                        if (format.charAt(iFormat) == "'" && !doubled("'")) {
                            literal = false;
                        }
                        else {
                            checkLiteral();
                        }
                    }
                    else {
                        switch (format.charAt(iFormat)) {
                            case 'd': day = getNumber('d'); break;
                            case 'D': getName('D', dayNamesShort, dayNames); break;
                            case 'o': doy = getNumber('o'); break;
                            case 'w': getNumber('w'); break;
                            case 'm': month = getNumber('m'); break;
                            case 'M': month = getName('M', monthNamesShort, monthNames); break;
                            case 'y':
                                var iSave = iFormat;
                                shortYear = !doubled('y', 2);
                                iFormat = iSave;
                                year = getNumber('y', 2);
                                break;
                            case '@':
                                var date = this._normaliseDate(new Date(getNumber('@') * 1000));
                                year = date.getFullYear();
                                month = date.getMonth() + 1;
                                day = date.getDate();
                                break;
                            case '!':
                                var date = this._normaliseDate(
							new Date((getNumber('!') - this._ticksTo1970) / 10000));
                                year = date.getFullYear();
                                month = date.getMonth() + 1;
                                day = date.getDate();
                                break;
                            case '*': iValue = value.length; break;
                            case "'":
                                if (doubled("'")) {
                                    checkLiteral();
                                }
                                else {
                                    literal = true;
                                }
                                break;
                            default: checkLiteral();
                        }
                    }
                }
                if (iValue < value.length) {
                    throw 'Additional text found at end';
                }
                if (year == -1) {
                    year = this.today().getFullYear();
                }
                else if (year < 100 && shortYear) {
                    year += (shortYearCutoff == -1 ? 1900 : this.today().getFullYear() -
				this.today().getFullYear() % 100 - (year <= shortYearCutoff ? 0 : 100));
                }
                if (doy > -1) {
                    month = 1;
                    day = doy;
                    for (var dim = this.daysInMonth(year, month); day > dim;
					dim = this.daysInMonth(year, month)) {
                        month++;
                        day -= dim;
                    }
                }
                var date = this.newDate(year, month, day);
                if (date.getFullYear() != year || date.getMonth() + 1 != month || date.getDate() != day) {
                    throw 'Invalid date';
                }
                return date;
            },

            /* A date may be specified as an exact value or a relative one.
            @param  dateSpec     (Date or number or string) the date as an object or string
            in the given format or an offset - numeric days from today,
            or string amounts and periods, e.g. '+1m +2w'
            @param  defaultDate  (Date) the date to use if no other supplied, may be null
            @param  currentDate  (Date) the current date as a possible basis for relative dates,
            if null today is used (optional)
            @param  dateFormat   (string) the expected date format - see formatDate above (optional)
            @param  settings     (object) attributes include:
            shortYearCutoff  (number) the cutoff year for determining the century (optional)
            dayNamesShort    (string[7]) abbreviated names of the days from Sunday (optional)
            dayNames         (string[7]) names of the days from Sunday (optional)
            monthNamesShort  (string[12]) abbreviated names of the months (optional)
            monthNames       (string[12]) names of the months (optional)
            @return  (Date) the decoded date */
            determineDate: function(dateSpec, defaultDate, currentDate, dateFormat, settings) {
                if (currentDate && typeof currentDate != 'object') {
                    settings = dateFormat;
                    dateFormat = currentDate;
                    currentDate = null;
                }
                if (typeof dateFormat != 'string') {
                    settings = dateFormat;
                    dateFormat = '';
                }
                var offsetString = function(offset) {
                    try {
                        return $.datepick.parseDate(dateFormat, offset, settings);
                    }
                    catch (e) {
                        // Ignore
                    }
                    offset = offset.toLowerCase();
                    var date = (offset.match(/^c/) && currentDate ? $.datepick.newDate(currentDate) : null) ||
				$.datepick.today();
                    var pattern = /([+-]?[0-9]+)\s*(d|w|m|y)?/g;
                    var matches = pattern.exec(offset);
                    while (matches) {
                        date = $.datepick.add(date, parseInt(matches[1], 10), matches[2] || 'd');
                        matches = pattern.exec(offset);
                    }
                    return date;
                };
                defaultDate = (defaultDate ? $.datepick.newDate(defaultDate) : null);
                dateSpec = (dateSpec == null ? defaultDate :
			(typeof dateSpec == 'string' ? offsetString(dateSpec) : (typeof dateSpec == 'number' ?
			(isNaN(dateSpec) || dateSpec == Infinity || dateSpec == -Infinity ? defaultDate :
			$.datepick.add($.datepick.today(), dateSpec, 'd')) : $.datepick.newDate(dateSpec))));
                return dateSpec;
            },

            /* Find the number of days in a given month.
            @param  year   (Date) the date to get days for or
            (number) the full year
            @param  month  (number) the month (1 to 12)
            @return  (number) the number of days in this month */
            daysInMonth: function(year, month) {
                month = (year.getFullYear ? year.getMonth() + 1 : month);
                year = (year.getFullYear ? year.getFullYear() : year);
                return this.newDate(year, month + 1, 0).getDate();
            },

            /* Calculate the day of the year for a date.
            @param  year   (Date) the date to get the day-of-year for or
            (number) the full year
            @param  month  (number) the month (1-12)
            @param  day    (number) the day
            @return  (number) the day of the year */
            dayOfYear: function(year, month, day) {
                var date = (year.getFullYear ? year : this.newDate(year, month, day));
                var newYear = this.newDate(date.getFullYear(), 1, 1);
                return Math.floor((date.getTime() - newYear.getTime()) / this._msPerDay) + 1;
            },

            /* Set as calculateWeek to determine the week of the year based on the ISO 8601 definition.
            @param  year   (Date) the date to get the week for or
            (number) the full year
            @param  month  (number) the month (1-12)
            @param  day    (number) the day
            @return  (number) the number of the week within the year that contains this date */
            iso8601Week: function(year, month, day) {
                var checkDate = (year.getFullYear ?
			new Date(year.getTime()) : this.newDate(year, month, day));
                // Find Thursday of this week starting on Monday
                checkDate.setDate(checkDate.getDate() + 4 - (checkDate.getDay() || 7));
                var time = checkDate.getTime();
                checkDate.setMonth(0, 1); // Compare with Jan 1
                return Math.floor(Math.round((time - checkDate) / 86400000) / 7) + 1;
            },

            /* Return today's date.
            @return  (Date) today */
            today: function() {
                return this._normaliseDate(new Date());
            },

            /* Return a new date.
            @param  year   (Date) the date to clone or
            (number) the year
            @param  month  (number) the month (1-12)
            @param  day    (number) the day
            @return  (Date) the date */
            newDate: function(year, month, day) {
                return (!year ? null : (year.getFullYear ? this._normaliseDate(new Date(year.getTime())) :
			new Date(year, month - 1, day, 12)));
            },

            /* Standardise a date into a common format - time portion is 12 noon.
            @param  date  (Date) the date to standardise
            @return  (Date) the normalised date */
            _normaliseDate: function(date) {
                if (date) {
                    date.setHours(12, 0, 0, 0);
                }
                return date;
            },

            /* Set the year for a date.
            @param  date  (Date) the original date
            @param  year  (number) the new year
            @return  the updated date */
            year: function(date, year) {
                date.setFullYear(year);
                return this._normaliseDate(date);
            },

            /* Set the month for a date.
            @param  date   (Date) the original date
            @param  month  (number) the new month (1-12)
            @return  the updated date */
            month: function(date, month) {
                date.setMonth(month - 1);
                return this._normaliseDate(date);
            },

            /* Set the day for a date.
            @param  date  (Date) the original date
            @param  day   (number) the new day of the month
            @return  the updated date */
            day: function(date, day) {
                date.setDate(day);
                return this._normaliseDate(date);
            },

            /* Add a number of periods to a date.
            @param  date    (Date) the original date
            @param  amount  (number) the number of periods
            @param  period  (string) the type of period d/w/m/y
            @return  the updated date */
            add: function(date, amount, period) {
                if (period == 'd' || period == 'w') {
                    this._normaliseDate(date);
                    date.setDate(date.getDate() + amount * (period == 'w' ? 7 : 1));
                }
                else {
                    var year = date.getFullYear() + (period == 'y' ? amount : 0);
                    var month = date.getMonth() + (period == 'm' ? amount : 0);
                    date.setTime($.datepick.newDate(year, month + 1,
				Math.min(date.getDate(), this.daysInMonth(year, month + 1))).getTime());
                }
                return date;
            },

            /* Apply the months offset value to a date.
            @param  date  (Date) the original date
            @param  inst  (object) the current instance settings
            @return  (Date) the updated date */
            _applyMonthsOffset: function(date, inst) {
                var monthsOffset = inst.get('monthsOffset');
                if ($.isFunction(monthsOffset)) {
                    monthsOffset = monthsOffset.apply(inst.target[0], [date]);
                }
                return $.datepick.add(date, -monthsOffset, 'm');
            },

            /* Attach the datepicker functionality to an input field.
            @param  target    (element) the control to affect
            @param  settings  (object) the custom options for this instance */
            _attachPicker: function(target, settings) {
                target = $(target);
                if (target.hasClass(this.markerClass)) {
                    return;
                }
                target.addClass(this.markerClass);
                var inst = { target: target, selectedDates: [], drawDate: null, pickingRange: false,
                    inline: ($.inArray(target[0].nodeName.toLowerCase(), ['div', 'span']) > -1),
                    get: function(name) { // Get a setting value, defaulting if necessary
                        var value = this.settings[name] !== undefined ?
					this.settings[name] : $.datepick._defaults[name];
                        if ($.inArray(name, ['defaultDate', 'minDate', 'maxDate']) > -1) { // Decode date settings
                            value = $.datepick.determineDate(
						value, null, this.selectedDates[0], this.get('dateFormat'), inst.getConfig());
                        }
                        return value;
                    },
                    curMinDate: function() {
                        return (this.pickingRange ? this.selectedDates[0] : this.get('minDate'));
                    },
                    getConfig: function() {
                        return { dayNamesShort: this.get('dayNamesShort'), dayNames: this.get('dayNames'),
                            monthNamesShort: this.get('monthNamesShort'), monthNames: this.get('monthNames'),
                            calculateWeek: this.get('calculateWeek'),
                            shortYearCutoff: this.get('shortYearCutoff')
                        };
                    }
                };
                $.data(target[0], this.dataName, inst);
                var inlineSettings = ($.fn.metadata ? target.metadata() : {});
                inst.settings = $.extend({}, settings || {}, inlineSettings || {});
                if (inst.inline) {
                    inst.drawDate = $.datepick._checkMinMax($.datepick.newDate(inst.selectedDates[0] ||
				inst.get('defaultDate') || $.datepick.today()), inst);
                    inst.prevDate = $.datepick.newDate(inst.drawDate);
                    this._update(target[0]);
                    if ($.fn.mousewheel) {
                        target.mousewheel(this._doMouseWheel);
                    }
                }
                else {
                    this._attachments(target, inst);
                    target.bind('keydown.' + this.dataName, this._keyDown).
				bind('keypress.' + this.dataName, this._keyPress).
				bind('keyup.' + this.dataName, this._keyUp);
                    if (target.attr('disabled')) {
                        this.disable(target[0]);
                    }
                }
            },

            /* Retrieve the settings for a datepicker control.
            @param  target  (element) the control to affect
            @param  name    (string) the name of the setting (optional)
            @return  (object) the current instance settings (name == 'all') or
            (object) the default settings (no name) or
            (any) the setting value (name supplied) */
            options: function(target, name) {
                var inst = $.data(target, this.dataName);
                return (inst ? (name ? (name == 'all' ?
			inst.settings : inst.settings[name]) : $.datepick._defaults) : {});
            },

            /* Reconfigure the settings for a datepicker control.
            @param  target    (element) the control to affect
            @param  settings  (object) the new options for this instance or
            (string) an individual property name
            @param  value     (any) the individual property value (omit if settings is an object) */
            option: function(target, settings, value) {
                target = $(target);
                if (!target.hasClass(this.markerClass)) {
                    return;
                }
                settings = settings || {};
                if (typeof settings == 'string') {
                    var name = settings;
                    settings = {};
                    settings[name] = value;
                }
                var inst = $.data(target[0], this.dataName);
                var dates = inst.selectedDates;
                extendRemove(inst.settings, settings);
                this.setDate(target[0], dates, null, false, true);
                inst.pickingRange = false;
                inst.drawDate = $.datepick.newDate(this._checkMinMax(
			(settings.defaultDate ? inst.get('defaultDate') : inst.drawDate) ||
			inst.get('defaultDate') || $.datepick.today(), inst));
                if (!inst.inline) {
                    this._attachments(target, inst);
                }
                if (inst.inline || inst.div) {
                    this._update(target[0]);
                }
            },

            /* Attach events and trigger, if necessary.
            @param  target  (jQuery) the control to affect
            @param  inst    (object) the current instance settings */
            _attachments: function(target, inst) {
                target.unbind('focus.' + this.dataName);
                if (inst.get('showOnFocus')) {
                    target.bind('focus.' + this.dataName, this.show);
                }
                if (inst.trigger) {
                    inst.trigger.remove();
                }
                var trigger = inst.get('showTrigger');
                inst.trigger = (!trigger ? $([]) :
			$(trigger).clone().removeAttr('id').addClass(this._triggerClass)
				[inst.get('isRTL') ? 'insertBefore' : 'insertAfter'](target).
				click(function() {
				    if (!$.datepick.isDisabled(target[0])) {
				        $.datepick[$.datepick.curInst == inst ?
							'hide' : 'show'](target[0]);
				    }
				}));
                this._autoSize(target, inst);
                var dates = this._extractDates(inst, target.val());
                if (dates) {
                    this.setDate(target[0], dates, null, true);
                }
                if (inst.get('selectDefaultDate') && inst.get('defaultDate') &&
				inst.selectedDates.length == 0) {
                    this.setDate(target[0], $.datepick.newDate(inst.get('defaultDate') || $.datepick.today()));
                }
            },

            /* Apply the maximum length for the date format.
            @param  inst  (object) the current instance settings */
            _autoSize: function(target, inst) {
                if (inst.get('autoSize') && !inst.inline) {
                    var date = $.datepick.newDate(2009, 10, 20); // Ensure double digits
                    var dateFormat = inst.get('dateFormat');
                    if (dateFormat.match(/[DM]/)) {
                        var findMax = function(names) {
                            var max = 0;
                            var maxI = 0;
                            for (var i = 0; i < names.length; i++) {
                                if (names[i].length > max) {
                                    max = names[i].length;
                                    maxI = i;
                                }
                            }
                            return maxI;
                        };
                        date.setMonth(findMax(inst.get(dateFormat.match(/MM/) ? // Longest month
					'monthNames' : 'monthNamesShort')));
                        date.setDate(findMax(inst.get(dateFormat.match(/DD/) ? // Longest day
					'dayNames' : 'dayNamesShort')) + 20 - date.getDay());
                    }
                    inst.target.attr('size', $.datepick.formatDate(dateFormat, date, inst.getConfig()).length);
                }
            },

            /* Remove the datepicker functionality from a control.
            @param  target  (element) the control to affect */
            destroy: function(target) {
                target = $(target);
                if (!target.hasClass(this.markerClass)) {
                    return;
                }
                var inst = $.data(target[0], this.dataName);
                if (inst.trigger) {
                    inst.trigger.remove();
                }
                target.removeClass(this.markerClass).empty().unbind('.' + this.dataName);
                if (inst.inline && $.fn.mousewheel) {
                    target.unmousewheel();
                }
                if (!inst.inline && inst.get('autoSize')) {
                    target.removeAttr('size');
                }
                $.removeData(target[0], this.dataName);
            },

            /* Apply multiple event functions.
            Usage, for example: onShow: multipleEvents(fn1, fn2, ...)
            @param  fns  (function...) the functions to apply */
            multipleEvents: function(fns) {
                var funcs = arguments;
                return function(args) {
                    for (var i = 0; i < funcs.length; i++) {
                        funcs[i].apply(this, arguments);
                    }
                };
            },

            /* Enable the datepicker and any associated trigger.
            @param  target  (element) the control to use */
            enable: function(target) {
                var $target = $(target);
                if (!$target.hasClass(this.markerClass)) {
                    return;
                }
                var inst = $.data(target, this.dataName);
                if (inst.inline)
                    $target.children('.' + this._disableClass).remove().end().
				find('button,select').attr('disabled', '').end().
				find('a').attr('href', 'javascript:void(0)');
                else {
                    target.disabled = false;
                    inst.trigger.filter('button.' + this._triggerClass).
				attr('disabled', '').end().
				filter('img.' + this._triggerClass).
				css({ opacity: '1.0', cursor: '' });
                }
                this._disabled = $.map(this._disabled,
			function(value) { return (value == target ? null : value); }); // Delete entry
            },

            /* Disable the datepicker and any associated trigger.
            @param  target  (element) the control to use */
            disable: function(target) {
                var $target = $(target);
                if (!$target.hasClass(this.markerClass))
                    return;
                var inst = $.data(target, this.dataName);
                if (inst.inline) {
                    var inline = $target.children(':last');
                    var offset = inline.offset();
                    var relOffset = { left: 0, top: 0 };
                    inline.parents().each(function() {
                        if ($(this).css('position') == 'relative') {
                            relOffset = $(this).offset();
                            return false;
                        }
                    });
                    var zIndex = $target.css('zIndex');
                    zIndex = (zIndex == 'auto' ? 0 : parseInt(zIndex, 10)) + 1;
                    $target.prepend('<div class="' + this._disableClass + '" style="' +
				'width: ' + inline.outerWidth() + 'px; height: ' + inline.outerHeight() +
				'px; left: ' + (offset.left - relOffset.left) + 'px; top: ' +
				(offset.top - relOffset.top) + 'px; z-index: ' + zIndex + '"></div>').
				find('button,select').attr('disabled', 'disabled').end().
				find('a').removeAttr('href');
                }
                else {
                    target.disabled = true;
                    inst.trigger.filter('button.' + this._triggerClass).
				attr('disabled', 'disabled').end().
				filter('img.' + this._triggerClass).
				css({ opacity: '0.5', cursor: 'default' });
                }
                this._disabled = $.map(this._disabled,
			function(value) { return (value == target ? null : value); }); // Delete entry
                this._disabled.push(target);
            },

            /* Is the first field in a jQuery collection disabled as a datepicker?
            @param  target  (element) the control to examine
            @return  (boolean) true if disabled, false if enabled */
            isDisabled: function(target) {
                return (target && $.inArray(target, this._disabled) > -1);
            },

            /* Show a popup datepicker.
            @param  target  (event) a focus event or
            (element) the control to use */
            show: function(target) {
                target = target.target || target;
                var inst = $.data(target, $.datepick.dataName);
                if ($.datepick.curInst == inst) {
                    return;
                }
                if ($.datepick.curInst) {
                    $.datepick.hide($.datepick.curInst, true);
                }
                if (inst) {
                    // Retrieve existing date(s)
                    inst.lastVal = null;
                    inst.selectedDates = $.datepick._extractDates(inst, $(target).val());
                    inst.pickingRange = false;
                    inst.drawDate = $.datepick._checkMinMax($.datepick.newDate(inst.selectedDates[0] ||
				inst.get('defaultDate') || $.datepick.today()), inst);
                    inst.prevDate = $.datepick.newDate(inst.drawDate);
                    $.datepick.curInst = inst;
                    // Generate content
                    $.datepick._update(target, true);
                    // Adjust position before showing
                    var offset = $.datepick._checkOffset(inst);
                    inst.div.css({ left: offset.left, top: offset.top });
                    // And display
                    var showAnim = inst.get('showAnim');
                    var showSpeed = inst.get('showSpeed');
                    showSpeed = (showSpeed == 'normal' && $.ui && $.ui.version >= '1.8' ?
				'_default' : showSpeed);
                    var postProcess = function() {
                        var cover = inst.div.find('.' + $.datepick._coverClass);
                        if (cover.length) {
                            var borders = $.datepick._getBorders(inst.div);
                            cover.css({ left: -borders[0], top: -borders[1], // IE6- only
                                width: inst.div.outerWidth() + borders[0],
                                height: inst.div.outerHeight() + borders[1]
                            });
                        }
                    };
                    if ($.effects && $.effects[showAnim]) {
                        var data = inst.div.data(); // Update old effects data
                        for (var key in data) {
                            if (key.match(/^ec\.storage\./)) {
                                data[key] = inst._mainDiv.css(key.replace(/ec\.storage\./, ''));
                            }
                        }
                        inst.div.data(data).show(showAnim, inst.get('showOptions'), showSpeed, postProcess);
                    }
                    else {
                        inst.div[showAnim || 'show']((showAnim ? showSpeed : ''), postProcess);
                    }
                    if (!showAnim) {
                        postProcess();
                    }
                }
            },

            /* Extract possible dates from a string.
            @param  inst  (object) the current instance settings
            @param  text  (string) the text to extract from
            @return  (CDate[]) the extracted dates */
            _extractDates: function(inst, datesText) {
                if (datesText == inst.lastVal) {
                    return;
                }
                inst.lastVal = datesText;
                var dateFormat = inst.get('dateFormat');
                var multiSelect = inst.get('multiSelect');
                var rangeSelect = inst.get('rangeSelect');
                datesText = datesText.split(multiSelect ? inst.get('multiSeparator') :
			(rangeSelect ? inst.get('rangeSeparator') : '\x00'));
                var dates = [];
                for (var i = 0; i < datesText.length; i++) {
                    try {
                        var date = $.datepick.parseDate(dateFormat, datesText[i], inst.getConfig());
                        if (date) {
                            var found = false;
                            for (var j = 0; j < dates.length; j++) {
                                if (dates[j].getTime() == date.getTime()) {
                                    found = true;
                                    break;
                                }
                            }
                            if (!found) {
                                dates.push(date);
                            }
                        }
                    }
                    catch (e) {
                        // Ignore
                    }
                }
                dates.splice(multiSelect || (rangeSelect ? 2 : 1), dates.length);
                if (rangeSelect && dates.length == 1) {
                    dates[1] = dates[0];
                }
                return dates;
            },

            /* Update the datepicker display.
            @param  target  (event) a focus event or
            (element) the control to use
            @param  hidden  (boolean) true to initially hide the datepicker */
            _update: function(target, hidden) {
                target = $(target.target || target);
                var inst = $.data(target[0], $.datepick.dataName);
                if (inst) {
                    if (inst.inline || $.datepick.curInst == inst) {
                        var onChange = inst.get('onChangeMonthYear');
                        if (onChange && (!inst.prevDate ||
						inst.prevDate.getFullYear() != inst.drawDate.getFullYear() ||
						inst.prevDate.getMonth() != inst.drawDate.getMonth())) {
                            onChange.apply(target[0], [inst.drawDate.getFullYear(), inst.drawDate.getMonth() + 1]);
                        }
                    }
                    if (inst.inline) {
                        target.html(this._generateContent(target[0], inst));
                    }
                    else if ($.datepick.curInst == inst) {
                        if (!inst.div) {
                            inst.div = $('<div></div>').addClass(this._popupClass).
						css({ display: (hidden ? 'none' : 'static'), position: 'absolute',
						    left: target.offset().left,
						    top: target.offset().top + target.outerHeight()
						}).
						appendTo($(inst.get('popupContainer') || 'body'));
                            if ($.fn.mousewheel) {
                                inst.div.mousewheel(this._doMouseWheel);
                            }
                        }
                        inst.div.html(this._generateContent(target[0], inst));
                        target.focus();
                    }
                }
            },

            /* Update the input field and any alternate field with the current dates.
            @param  target  (element) the control to use
            @param  keyUp   (boolean, internal) true if coming from keyUp processing */
            _updateInput: function(target, keyUp) {
                var inst = $.data(target, this.dataName);
                if (inst) {
                    var value = '';
                    var altValue = '';
                    var sep = (inst.get('multiSelect') ? inst.get('multiSeparator') :
				inst.get('rangeSeparator'));
                    var dateFormat = inst.get('dateFormat');
                    var altFormat = inst.get('altFormat') || dateFormat;
                    for (var i = 0; i < inst.selectedDates.length; i++) {
                        value += (keyUp ? '' : (i > 0 ? sep : '') + $.datepick.formatDate(
					dateFormat, inst.selectedDates[i], inst.getConfig()));
                        altValue += (i > 0 ? sep : '') + $.datepick.formatDate(
					altFormat, inst.selectedDates[i], inst.getConfig());
                    }
                    if (!inst.inline && !keyUp) {
                        $(target).val(value);
                    }
                    $(inst.get('altField')).val(altValue);
                    var onSelect = inst.get('onSelect');
                    if (onSelect && !keyUp && !inst.inSelect) {
                        inst.inSelect = true; // Prevent endless loops
                        onSelect.apply(target, [inst.selectedDates]);
                        inst.inSelect = false;
                    }
                }
            },

            /* Retrieve the size of left and top borders for an element.
            @param  elem  (jQuery) the element of interest
            @return  (number[2]) the left and top borders */
            _getBorders: function(elem) {
                var convert = function(value) {
                    var extra = ($.browser.msie ? 1 : 0);
                    return { thin: 1 + extra, medium: 3 + extra, thick: 5 + extra}[value] || value;
                };
                return [parseFloat(convert(elem.css('border-left-width'))),
			parseFloat(convert(elem.css('border-top-width')))];
            },

            /* Check positioning to remain on the screen.
            @param  inst  (object) the current instance settings
            @return  (object) the updated offset for the datepicker */
            _checkOffset: function(inst) {
                var base = (inst.target.is(':hidden') && inst.trigger ? inst.trigger : inst.target);
                var offset = base.offset();
                var isFixed = false;
                $(inst.target).parents().each(function() {
                    isFixed |= $(this).css('position') == 'fixed';
                    return !isFixed;
                });
                if (isFixed && $.browser.opera) { // Correction for Opera when fixed and scrolled
                    offset.left -= document.documentElement.scrollLeft;
                    offset.top -= document.documentElement.scrollTop;
                }
                var browserWidth = (!$.browser.mozilla || document.doctype ?
			document.documentElement.clientWidth : 0) || document.body.clientWidth;
                var browserHeight = (!$.browser.mozilla || document.doctype ?
			document.documentElement.clientHeight : 0) || document.body.clientHeight;
                if (browserWidth == 0) {
                    return offset;
                }
                var alignment = inst.get('alignment');
                var isRTL = inst.get('isRTL');
                var scrollX = document.documentElement.scrollLeft || document.body.scrollLeft;
                var scrollY = document.documentElement.scrollTop || document.body.scrollTop;
                var above = offset.top - inst.div.outerHeight() -
			(isFixed && $.browser.opera ? document.documentElement.scrollTop : 0);
                var below = offset.top + base.outerHeight();
                var alignL = offset.left;
                var alignR = offset.left + base.outerWidth() - inst.div.outerWidth() -
			(isFixed && $.browser.opera ? document.documentElement.scrollLeft : 0);
                var tooWide = (offset.left + inst.div.outerWidth() - scrollX) > browserWidth;
                var tooHigh = (offset.top + inst.target.outerHeight() + inst.div.outerHeight() -
			scrollY) > browserHeight;
                if (alignment == 'topLeft') {
                    offset = { left: alignL, top: above };
                }
                else if (alignment == 'topRight') {
                    offset = { left: alignR, top: above };
                }
                else if (alignment == 'bottomLeft') {
                    offset = { left: alignL, top: below };
                }
                else if (alignment == 'bottomRight') {
                    offset = { left: alignR, top: below };
                }
                else if (alignment == 'top') {
                    offset = { left: (isRTL || tooWide ? alignR : alignL), top: above };
                }
                else { // bottom
                    offset = { left: (isRTL || tooWide ? alignR : alignL),
                        top: (tooHigh ? above : below)
                    };
                }
                offset.left = Math.max((isFixed ? 0 : scrollX), offset.left - (isFixed ? scrollX : 0));
                offset.top = Math.max((isFixed ? 0 : scrollY), offset.top - (isFixed ? scrollY : 0));
                return offset;
            },

            /* Close date picker if clicked elsewhere.
            @param  event  (MouseEvent) the mouse click to check */
            _checkExternalClick: function(event) {
                if (!$.datepick.curInst) {
                    return;
                }
                var target = $(event.target);
                if (!target.parents().andSelf().hasClass($.datepick._popupClass) &&
				!target.hasClass($.datepick.markerClass) &&
				!target.parents().andSelf().hasClass($.datepick._triggerClass)) {
                    $.datepick.hide($.datepick.curInst);
                }
            },

            /* Hide a popup datepicker.
            @param  target     (element) the control to use or
            (object) the current instance settings
            @param  immediate  (boolean) true to close immediately without animation */
            hide: function(target, immediate) {
                var inst = $.data(target, this.dataName) || target;
                if (inst && inst == $.datepick.curInst) {
                    var showAnim = (immediate ? '' : inst.get('showAnim'));
                    var showSpeed = inst.get('showSpeed');
                    showSpeed = (showSpeed == 'normal' && $.ui && $.ui.version >= '1.8' ?
				'_default' : showSpeed);
                    var postProcess = function() {
                        inst.div.remove();
                        inst.div = null;
                        $.datepick.curInst = null;
                        var onClose = inst.get('onClose');
                        if (onClose) {
                            onClose.apply(target, [inst.selectedDates]);
                        }
                    };
                    inst.div.stop();
                    if ($.effects && $.effects[showAnim]) {
                        inst.div.hide(showAnim, inst.get('showOptions'), showSpeed, postProcess);
                    }
                    else {
                        var hideAnim = (showAnim == 'slideDown' ? 'slideUp' :
					(showAnim == 'fadeIn' ? 'fadeOut' : 'hide'));
                        inst.div[hideAnim]((showAnim ? showSpeed : ''), postProcess);
                    }
                    if (!showAnim) {
                        postProcess();
                    }
                }
            },

            /* Handle keystrokes in the datepicker.
            @param  event  (KeyEvent) the keystroke
            @return  (boolean) true if not handled, false if handled */
            _keyDown: function(event) {
                var target = event.target;
                var inst = $.data(target, $.datepick.dataName);
                var handled = false;
                if (inst.div) {
                    if (event.keyCode == 9) { // Tab - close
                        $.datepick.hide(target);
                    }
                    else if (event.keyCode == 13) { // Enter - select
                        $.datepick.selectDate(target,
					$('a.' + inst.get('renderer').highlightedClass, inst.div)[0]);
                        handled = true;
                    }
                    else { // Command keystrokes
                        var commands = inst.get('commands');
                        for (var name in commands) {
                            var command = commands[name];
                            if (command.keystroke.keyCode == event.keyCode &&
							!!command.keystroke.ctrlKey == !!(event.ctrlKey || event.metaKey) &&
							!!command.keystroke.altKey == event.altKey &&
							!!command.keystroke.shiftKey == event.shiftKey) {
                                $.datepick.performAction(target, name);
                                handled = true;
                                break;
                            }
                        }
                    }
                }
                else { // Show on 'current' keystroke
                    var command = inst.get('commands').current;
                    if (command.keystroke.keyCode == event.keyCode &&
					!!command.keystroke.ctrlKey == !!(event.ctrlKey || event.metaKey) &&
					!!command.keystroke.altKey == event.altKey &&
					!!command.keystroke.shiftKey == event.shiftKey) {
                        $.datepick.show(target);
                        handled = true;
                    }
                }
                inst.ctrlKey = ((event.keyCode < 48 && event.keyCode != 32) ||
			event.ctrlKey || event.metaKey);
                if (handled) {
                    event.preventDefault();
                    event.stopPropagation();
                }
                return !handled;
            },

            /* Filter keystrokes in the datepicker.
            @param  event  (KeyEvent) the keystroke
            @return  (boolean) true if allowed, false if not allowed */
            _keyPress: function(event) {
                var target = event.target;
                var inst = $.data(target, $.datepick.dataName);
                if (inst && inst.get('constrainInput')) {
                    var ch = String.fromCharCode(event.keyCode || event.charCode);
                    var allowedChars = $.datepick._allowedChars(inst);
                    return (event.metaKey || inst.ctrlKey || ch < ' ' ||
				!allowedChars || allowedChars.indexOf(ch) > -1);
                }
                return false;
            },

            /* Determine the set of characters allowed by the date format.
            @param  inst  (object) the current instance settings
            @return  (string) the set of allowed characters, or null if anything allowed */
            _allowedChars: function(inst) {
                var dateFormat = inst.get('dateFormat');
                var allowedChars = (inst.get('multiSelect') ? inst.get('multiSeparator') :
			(inst.get('rangeSelect') ? inst.get('rangeSeparator') : ''));
                var literal = false;
                var hasNum = false;
                for (var i = 0; i < dateFormat.length; i++) {
                    var ch = dateFormat.charAt(i);
                    if (literal) {
                        if (ch == "'" && dateFormat.charAt(i + 1) != "'") {
                            literal = false;
                        }
                        else {
                            allowedChars += ch;
                        }
                    }
                    else {
                        switch (ch) {
                            case 'd': case 'm': case 'o': case 'w':
                                allowedChars += (hasNum ? '' : '0123456789'); hasNum = true; break;
                            case 'y': case '@': case '!':
                                allowedChars += (hasNum ? '' : '0123456789') + '-'; hasNum = true; break;
                            case 'J':
                                allowedChars += (hasNum ? '' : '0123456789') + '-.'; hasNum = true; break;
                            case 'D': case 'M': case 'Y':
                                return null; // Accept anything
                            case "'":
                                if (dateFormat.charAt(i + 1) == "'") {
                                    allowedChars += "'";
                                }
                                else {
                                    literal = true;
                                }
                                break;
                            default:
                                allowedChars += ch;
                        }
                    }
                }
                return allowedChars;
            },

            /* Synchronise datepicker with the field.
            @param  event  (KeyEvent) the keystroke
            @return  (boolean) true if allowed, false if not allowed */
            _keyUp: function(event) {
                var target = event.target;
                var inst = $.data(target, $.datepick.dataName);
                if (inst && !inst.ctrlKey && inst.lastVal != inst.target.val()) {
                    try {
                        var dates = $.datepick._extractDates(inst, inst.target.val());
                        if (dates.length > 0) {
                            $.datepick.setDate(target, dates, null, true);
                        }
                    }
                    catch (event) {
                        // Ignore
                    }
                }
                return true;
            },

            /* Increment/decrement month/year on mouse wheel activity.
            @param  event  (event) the mouse wheel event
            @param  delta  (number) the amount of change */
            _doMouseWheel: function(event, delta) {
                var target = ($.datepick.curInst && $.datepick.curInst.target[0]) ||
			$(event.target).closest('.' + $.datepick.markerClass)[0];
                if ($.datepick.isDisabled(target)) {
                    return;
                }
                var inst = $.data(target, $.datepick.dataName);
                if (inst.get('useMouseWheel')) {
                    delta = ($.browser.opera ? -delta : delta);
                    delta = (delta < 0 ? -1 : +1);
                    $.datepick.changeMonth(target,
				-inst.get(event.ctrlKey ? 'monthsToJump' : 'monthsToStep') * delta);
                }
                event.preventDefault();
            },

            /* Clear an input and close a popup datepicker.
            @param  target  (element) the control to use */
            clear: function(target) {
                var inst = $.data(target, this.dataName);
                if (inst) {
                    inst.selectedDates = [];
                    this.hide(target);
                    if (inst.get('selectDefaultDate') && inst.get('defaultDate')) {
                        this.setDate(target,
					$.datepick.newDate(inst.get('defaultDate') || $.datepick.today()));
                    }
                    else {
                        this._updateInput(target);
                    }
                }
            },

            /* Retrieve the selected date(s) for a datepicker.
            @param  target  (element) the control to examine
            @return  (CDate[]) the selected date(s) */
            getDate: function(target) {
                var inst = $.data(target, this.dataName);
                return (inst ? inst.selectedDates : []);
            },

            /* Set the selected date(s) for a datepicker.
            @param  target   (element) the control to examine
            @param  dates    (CDate or number or string or [] of these) the selected date(s)
            @param  endDate  (CDate or number or string) the ending date for a range (optional)
            @param  keyUp    (boolean, internal) true if coming from keyUp processing
            @param  setOpt   (boolean, internal) true if coming from option processing */
            setDate: function(target, dates, endDate, keyUp, setOpt) {
                var inst = $.data(target, this.dataName);
                if (inst) {
                    if (!$.isArray(dates)) {
                        dates = [dates];
                        if (endDate) {
                            dates.push(endDate);
                        }
                    }
                    var dateFormat = inst.get('dateFormat');
                    var minDate = inst.get('minDate');
                    var maxDate = inst.get('maxDate');
                    var curDate = inst.selectedDates[0];
                    inst.selectedDates = [];
                    for (var i = 0; i < dates.length; i++) {
                        var date = $.datepick.determineDate(
					dates[i], null, curDate, dateFormat, inst.getConfig());
                        if (date) {
                            if ((!minDate || date.getTime() >= minDate.getTime()) &&
							(!maxDate || date.getTime() <= maxDate.getTime())) {
                                var found = false;
                                for (var j = 0; j < inst.selectedDates.length; j++) {
                                    if (inst.selectedDates[j].getTime() == date.getTime()) {
                                        found = true;
                                        break;
                                    }
                                }
                                if (!found) {
                                    inst.selectedDates.push(date);
                                }
                            }
                        }
                    }
                    var rangeSelect = inst.get('rangeSelect');
                    inst.selectedDates.splice(inst.get('multiSelect') ||
				(rangeSelect ? 2 : 1), inst.selectedDates.length);
                    if (rangeSelect) {
                        switch (inst.selectedDates.length) {
                            case 1: inst.selectedDates[1] = inst.selectedDates[0]; break;
                            case 2: inst.selectedDates[1] =
						(inst.selectedDates[0].getTime() > inst.selectedDates[1].getTime() ?
						inst.selectedDates[0] : inst.selectedDates[1]); break;
                        }
                        inst.pickingRange = false;
                    }
                    inst.prevDate = (inst.drawDate ? $.datepick.newDate(inst.drawDate) : null);
                    inst.drawDate = this._checkMinMax($.datepick.newDate(inst.selectedDates[0] ||
				inst.get('defaultDate') || $.datepick.today()), inst);
                    if (!setOpt) {
                        this._update(target);
                        this._updateInput(target, keyUp);
                    }
                }
            },

            /* Determine whether a date is selectable for this datepicker.
            @param  target  (element) the control to check
            @param  date    (Date or string or number) the date to check
            @return  (boolean) true if selectable, false if not */
            isSelectable: function(target, date) {
                var inst = $.data(target, this.dataName);
                if (!inst) {
                    return false;
                }
                date = $.datepick.determineDate(date, inst.selectedDates[0] || this.today(), null,
			inst.get('dateFormat'), inst.getConfig());
                return this._isSelectable(target, date, inst.get('onDate'),
			inst.get('minDate'), inst.get('maxDate'));
            },

            /* Internally determine whether a date is selectable for this datepicker.
            @param  target   (element) the control to check
            @param  date     (Date) the date to check
            @param  onDate   (function or boolean) any onDate callback or callback.selectable
            @param  mindate  (Date) the minimum allowed date
            @param  maxdate  (Date) the maximum allowed date
            @return  (boolean) true if selectable, false if not */
            _isSelectable: function(target, date, onDate, minDate, maxDate) {
                var dateInfo = (typeof onDate == 'boolean' ? { selectable: onDate} :
			(!onDate ? {} : onDate.apply(target, [date, true])));
                return (dateInfo.selectable != false) &&
			(!minDate || date.getTime() >= minDate.getTime()) &&
			(!maxDate || date.getTime() <= maxDate.getTime());
            },

            /* Perform a named action for a datepicker.
            @param  target  (element) the control to affect
            @param  action  (string) the name of the action */
            performAction: function(target, action) {
                var inst = $.data(target, this.dataName);
                if (inst && !this.isDisabled(target)) {
                    var commands = inst.get('commands');
                    if (commands[action] && commands[action].enabled.apply(target, [inst])) {
                        commands[action].action.apply(target, [inst]);
                    }
                }
            },

            /* Set the currently shown month, defaulting to today's.
            @param  target  (element) the control to affect
            @param  year    (number) the year to show (optional)
            @param  month   (number) the month to show (1-12) (optional)
            @param  day     (number) the day to show (optional) */
            showMonth: function(target, year, month, day) {
                var inst = $.data(target, this.dataName);
                if (inst && (day != null ||
				(inst.drawDate.getFullYear() != year || inst.drawDate.getMonth() + 1 != month))) {
                    inst.prevDate = $.datepick.newDate(inst.drawDate);
                    var show = this._checkMinMax((year != null ?
				$.datepick.newDate(year, month, 1) : $.datepick.today()), inst);
                    inst.drawDate = $.datepick.newDate(show.getFullYear(), show.getMonth() + 1,
				(day != null ? day : Math.min(inst.drawDate.getDate(),
				$.datepick.daysInMonth(show.getFullYear(), show.getMonth() + 1))));
                    this._update(target);
                }
            },

            /* Adjust the currently shown month.
            @param  target  (element) the control to affect
            @param  offset  (number) the number of months to change by */
            changeMonth: function(target, offset) {
                var inst = $.data(target, this.dataName);
                if (inst) {
                    var date = $.datepick.add($.datepick.newDate(inst.drawDate), offset, 'm');
                    this.showMonth(target, date.getFullYear(), date.getMonth() + 1);
                }
            },

            /* Adjust the currently shown day.
            @param  target  (element) the control to affect
            @param  offset  (number) the number of days to change by */
            changeDay: function(target, offset) {
                var inst = $.data(target, this.dataName);
                if (inst) {
                    var date = $.datepick.add($.datepick.newDate(inst.drawDate), offset, 'd');
                    this.showMonth(target, date.getFullYear(), date.getMonth() + 1, date.getDate());
                }
            },

            /* Restrict a date to the minimum/maximum specified.
            @param  date  (CDate) the date to check
            @param  inst  (object) the current instance settings */
            _checkMinMax: function(date, inst) {
                var minDate = inst.get('minDate');
                var maxDate = inst.get('maxDate');
                date = (minDate && date.getTime() < minDate.getTime() ? $.datepick.newDate(minDate) : date);
                date = (maxDate && date.getTime() > maxDate.getTime() ? $.datepick.newDate(maxDate) : date);
                return date;
            },

            /* Retrieve the date associated with an entry in the datepicker.
            @param  target  (element) the control to examine
            @param  elem    (element) the selected datepicker element
            @return  (CDate) the corresponding date, or null */
            retrieveDate: function(target, elem) {
                var inst = $.data(target, this.dataName);
                return (!inst ? null : this._normaliseDate(
			new Date(parseInt(elem.className.replace(/^.*dp(-?\d+).*$/, '$1'), 10))));
            },

            /* Select a date for this datepicker.
            @param  target  (element) the control to examine
            @param  elem    (element) the selected datepicker element */
            selectDate: function(target, elem) {
                var inst = $.data(target, this.dataName);
                if (inst && !this.isDisabled(target)) {
                    var date = this.retrieveDate(target, elem);
                    var multiSelect = inst.get('multiSelect');
                    var rangeSelect = inst.get('rangeSelect');
                    if (multiSelect) {
                        var found = false;
                        for (var i = 0; i < inst.selectedDates.length; i++) {
                            if (date.getTime() == inst.selectedDates[i].getTime()) {
                                inst.selectedDates.splice(i, 1);
                                found = true;
                                break;
                            }
                        }
                        if (!found && inst.selectedDates.length < multiSelect) {
                            inst.selectedDates.push(date);
                        }
                    }
                    else if (rangeSelect) {
                        if (inst.pickingRange) {
                            inst.selectedDates[1] = date;
                        }
                        else {
                            inst.selectedDates = [date, date];
                        }
                        inst.pickingRange = !inst.pickingRange;
                    }
                    else {
                        inst.selectedDates = [date];
                    }
                    inst.prevDate = $.datepick.newDate(date);
                    this._updateInput(target);
                    if (inst.inline || inst.pickingRange || inst.selectedDates.length <
					(multiSelect || (rangeSelect ? 2 : 1))) {
                        this._update(target);
                    }
                    else {
                        this.hide(target);
                    }
                }
            },

            /* Generate the datepicker content for this control.
            @param  target  (element) the control to affect
            @param  inst    (object) the current instance settings
            @return  (jQuery) the datepicker content */
            _generateContent: function(target, inst) {
                var renderer = inst.get('renderer');
                var monthsToShow = inst.get('monthsToShow');
                monthsToShow = ($.isArray(monthsToShow) ? monthsToShow : [1, monthsToShow]);
                inst.drawDate = this._checkMinMax(
			inst.drawDate || inst.get('defaultDate') || $.datepick.today(), inst);
                var drawDate = $.datepick._applyMonthsOffset($.datepick.newDate(inst.drawDate), inst);
                // Generate months
                var monthRows = '';
                for (var row = 0; row < monthsToShow[0]; row++) {
                    var months = '';
                    for (var col = 0; col < monthsToShow[1]; col++) {
                        months += this._generateMonth(target, inst, drawDate.getFullYear(),
					drawDate.getMonth() + 1, renderer, (row == 0 && col == 0));
                        $.datepick.add(drawDate, 1, 'm');
                    }
                    monthRows += this._prepare(renderer.monthRow, inst).replace(/\{months\}/, months);
                }
                var picker = this._prepare(renderer.picker, inst).replace(/\{months\}/, monthRows).
			replace(/\{weekHeader\}/g, this._generateDayHeaders(inst, renderer)) +
			($.browser.msie && parseInt($.browser.version, 10) < 7 && !inst.inline ?
			'<iframe src="javascript:void(0);" class="' + this._coverClass + '"></iframe>' : '');
                // Add commands
                var commands = inst.get('commands');
                var asDateFormat = inst.get('commandsAsDateFormat');
                var addCommand = function(type, open, close, name, classes) {
                    if (picker.indexOf('{' + type + ':' + name + '}') == -1) {
                        return;
                    }
                    var command = commands[name];
                    var date = (asDateFormat ? command.date.apply(target, [inst]) : null);
                    picker = picker.replace(new RegExp('\\{' + type + ':' + name + '\\}', 'g'),
				'<' + open +
				(command.status ? ' title="' + inst.get(command.status) + '"' : '') +
				' class="' + renderer.commandClass + ' ' +
				renderer.commandClass + '-' + name + ' ' + classes +
				(command.enabled(inst) ? '' : ' ' + renderer.disabledClass) + '">' +
				(date ? $.datepick.formatDate(inst.get(command.text), date, inst.getConfig()) :
				inst.get(command.text)) + '</' + close + '>');
                };
                for (var name in commands) {
                    addCommand('button', 'button type="button"', 'button', name,
				renderer.commandButtonClass);
                    addCommand('link', 'a href="javascript:void(0)"', 'a', name,
				renderer.commandLinkClass);
                }
                picker = $(picker);
                if (monthsToShow[1] > 1) {
                    var count = 0;
                    $(renderer.monthSelector, picker).each(function() {
                        var nth = ++count % monthsToShow[1];
                        $(this).addClass(nth == 1 ? 'first' : (nth == 0 ? 'last' : ''));
                    });
                }
                // Add datepicker behaviour
                var self = this;
                picker.find(renderer.daySelector + ' a').hover(
				function() { $(this).addClass(renderer.highlightedClass); },
				function() {
				    (inst.inline ? $(this).parents('.' + self.markerClass) : inst.div).
						find(renderer.daySelector + ' a').
						removeClass(renderer.highlightedClass);
				}).
			click(function() {
			    self.selectDate(target, this);
			}).end().
			find('select.' + this._monthYearClass + ':not(.' + this._anyYearClass + ')').
			change(function() {
			    var monthYear = $(this).val().split('/');
			    self.showMonth(target, parseInt(monthYear[1], 10), parseInt(monthYear[0], 10));
			}).end().
			find('select.' + this._anyYearClass).
			click(function() {
			    $(this).css('visibility', 'hidden').
					next('input').css({ left: this.offsetLeft, top: this.offsetTop,
					    width: this.offsetWidth, height: this.offsetHeight
					}).show().focus();
			}).end().
			find('input.' + self._monthYearClass).
			change(function() {
			    try {
			        var year = parseInt($(this).val(), 10);
			        year = (isNaN(year) ? inst.drawDate.getFullYear() : year);
			        self.showMonth(target, year, inst.drawDate.getMonth() + 1, inst.drawDate.getDate());
			    }
			    catch (e) {
			        alert(e);
			    }
			}).keydown(function(event) {
			    if (event.keyCode == 13) { // Enter
			        $(event.target).change();
			    }
			    else if (event.keyCode == 27) { // Escape
			        $(event.target).hide().prev('select').css('visibility', 'visible');
			        inst.target.focus();
			    }
			});
                // Add command behaviour
                picker.find('.' + renderer.commandClass).click(function() {
                    if (!$(this).hasClass(renderer.disabledClass)) {
                        var action = this.className.replace(
						new RegExp('^.*' + renderer.commandClass + '-([^ ]+).*$'), '$1');
                        $.datepick.performAction(target, action);
                    }
                });
                // Add classes
                if (inst.get('isRTL')) {
                    picker.addClass(renderer.rtlClass);
                }
                if (monthsToShow[0] * monthsToShow[1] > 1) {
                    picker.addClass(renderer.multiClass);
                }
                var pickerClass = inst.get('pickerClass');
                if (pickerClass) {
                    picker.addClass(pickerClass);
                }
                // Resize
                $('body').append(picker);
                var width = 0;
                picker.find(renderer.monthSelector).each(function() {
                    width += $(this).outerWidth();
                });
                picker.width(width / monthsToShow[0]);
                // Pre-show customisation
                var onShow = inst.get('onShow');
                if (onShow) {
                    onShow.apply(target, [picker, inst]);
                }
                return picker;
            },

            /* Generate the content for a single month.
            @param  target    (element) the control to affect
            @param  inst      (object) the current instance settings
            @param  year      (number) the year to generate
            @param  month     (number) the month to generate
            @param  renderer  (object) the rendering templates
            @param  first     (boolean) true if first of multiple months
            @return  (string) the month content */
            _generateMonth: function(target, inst, year, month, renderer, first) {
                var daysInMonth = $.datepick.daysInMonth(year, month);
                var monthsToShow = inst.get('monthsToShow');
                monthsToShow = ($.isArray(monthsToShow) ? monthsToShow : [1, monthsToShow]);
                var fixedWeeks = inst.get('fixedWeeks') || (monthsToShow[0] * monthsToShow[1] > 1);
                var firstDay = inst.get('firstDay');
                var leadDays = ($.datepick.newDate(year, month, 1).getDay() - firstDay + 7) % 7;
                var numWeeks = (fixedWeeks ? 6 : Math.ceil((leadDays + daysInMonth) / 7));
                var showOtherMonths = inst.get('showOtherMonths');
                var selectOtherMonths = inst.get('selectOtherMonths') && showOtherMonths;
                var dayStatus = inst.get('dayStatus');
                var minDate = (inst.pickingRange ? inst.selectedDates[0] : inst.get('minDate'));
                var maxDate = inst.get('maxDate');
                var rangeSelect = inst.get('rangeSelect');
                var onDate = inst.get('onDate');
                var showWeeks = renderer.week.indexOf('{weekOfYear}') > -1;
                var calculateWeek = inst.get('calculateWeek');
                var today = $.datepick.today();
                var drawDate = $.datepick.newDate(year, month, 1);
                $.datepick.add(drawDate, -leadDays - (fixedWeeks && (drawDate.getDay() == firstDay) ? 7 : 0), 'd');
                var ts = drawDate.getTime();
                // Generate weeks
                var weeks = '';
                for (var week = 0; week < numWeeks; week++) {
                    var weekOfYear = (!showWeeks ? '' : '<span class="dp' + ts + '">' +
				(calculateWeek ? calculateWeek(drawDate) : 0) + '</span>');
                    var days = '';
                    for (var day = 0; day < 7; day++) {
                        var selected = false;
                        if (rangeSelect && inst.selectedDates.length > 0) {
                            selected = (drawDate.getTime() >= inst.selectedDates[0] &&
						drawDate.getTime() <= inst.selectedDates[1]);
                        }
                        else {
                            for (var i = 0; i < inst.selectedDates.length; i++) {
                                if (inst.selectedDates[i].getTime() == drawDate.getTime()) {
                                    selected = true;
                                    break;
                                }
                            }
                        }
                        var dateInfo = (!onDate ? {} :
					onDate.apply(target, [drawDate, drawDate.getMonth() + 1 == month]));
                        var selectable = (selectOtherMonths || drawDate.getMonth() + 1 == month) &&
					this._isSelectable(target, drawDate, dateInfo.selectable, minDate, maxDate);
                        days += this._prepare(renderer.day, inst).replace(/\{day\}/g,
					(selectable ? '<a href="javascript:void(0)"' : '<span') +
					' class="dp' + ts + ' ' + (dateInfo.dateClass || '') +
					(selected && (selectOtherMonths || drawDate.getMonth() + 1 == month) ?
					' ' + renderer.selectedClass : '') +
					(selectable ? ' ' + renderer.defaultClass : '') +
					((drawDate.getDay() || 7) < 6 ? '' : ' ' + renderer.weekendClass) +
					(drawDate.getMonth() + 1 == month ? '' : ' ' + renderer.otherMonthClass) +
					(drawDate.getTime() == today.getTime() && (drawDate.getMonth() + 1) == month ?
					' ' + renderer.todayClass : '') +
					(drawDate.getTime() == inst.drawDate.getTime() && (drawDate.getMonth() + 1) == month ?
					' ' + renderer.highlightedClass : '') + '"' +
					(dateInfo.title || (dayStatus && selectable) ? ' title="' +
					(dateInfo.title || $.datepick.formatDate(
					dayStatus, drawDate, inst.getConfig())) + '"' : '') + '>' +
					(showOtherMonths || (drawDate.getMonth() + 1) == month ?
					dateInfo.content || drawDate.getDate() : '&nbsp;') +
					(selectable ? '</a>' : '</span>'));
                        $.datepick.add(drawDate, 1, 'd');
                        ts = drawDate.getTime();
                    }
                    weeks += this._prepare(renderer.week, inst).replace(/\{days\}/g, days).
				replace(/\{weekOfYear\}/g, weekOfYear);
                }
                var monthHeader = this._prepare(renderer.month, inst).match(/\{monthHeader(:[^\}]+)?\}/);
                monthHeader = (monthHeader[0].length <= 13 ? 'MM yyyy' :
			monthHeader[0].substring(13, monthHeader[0].length - 1));
                monthHeader = (first ? this._generateMonthSelection(
			inst, year, month, minDate, maxDate, monthHeader, renderer) :
			$.datepick.formatDate(monthHeader, $.datepick.newDate(year, month, 1), inst.getConfig()));
                var weekHeader = this._prepare(renderer.weekHeader, inst).
			replace(/\{days\}/g, this._generateDayHeaders(inst, renderer));
                return this._prepare(renderer.month, inst).replace(/\{monthHeader(:[^\}]+)?\}/g, monthHeader).
			replace(/\{weekHeader\}/g, weekHeader).replace(/\{weeks\}/g, weeks);
            },

            /* Generate the HTML for the day headers.
            @param  inst      (object) the current instance settings
            @param  renderer  (object) the rendering templates
            @return  (string) a week's worth of day headers */
            _generateDayHeaders: function(inst, renderer) {
                var firstDay = inst.get('firstDay');
                var dayNames = inst.get('dayNames');
                var dayNamesMin = inst.get('dayNamesMin');
                var header = '';
                for (var day = 0; day < 7; day++) {
                    var dow = (day + firstDay) % 7;
                    header += this._prepare(renderer.dayHeader, inst).replace(/\{day\}/g,
				'<span class="' + this._curDoWClass + dow + '" title="' +
				dayNames[dow] + '">' + dayNamesMin[dow] + '</span>');
                }
                return header;
            },

            /* Generate selection controls for month.
            @param  inst         (object) the current instance settings
            @param  year         (number) the year to generate
            @param  month        (number) the month to generate
            @param  minDate      (CDate) the minimum date allowed
            @param  maxDate      (CDate) the maximum date allowed
            @param  monthHeader  (string) the month/year format
            @return  (string) the month selection content */
            _generateMonthSelection: function(inst, year, month, minDate, maxDate, monthHeader) {
                if (!inst.get('changeMonth')) {
                    return $.datepick.formatDate(
				monthHeader, $.datepick.newDate(year, month, 1), inst.getConfig());
                }
                // Months
                var monthNames = inst.get('monthNames' + (monthHeader.match(/mm/i) ? '' : 'Short'));
                var html = monthHeader.replace(/m+/i, '\\x2E').replace(/y+/i, '\\x2F');
                var selector = '<select class="' + this._monthYearClass +
			'" title="' + inst.get('monthStatus') + '">';
                for (var m = 1; m <= 12; m++) {
                    if ((!minDate || $.datepick.newDate(year, m, $.datepick.daysInMonth(year, m)).
					getTime() >= minDate.getTime()) &&
					(!maxDate || $.datepick.newDate(year, m, 1).getTime() <= maxDate.getTime())) {
                        selector += '<option value="' + m + '/' + year + '"' +
					(month == m ? ' selected="selected"' : '') + '>' +
					monthNames[m - 1] + '</option>';
                    }
                }
                selector += '</select>';
                html = html.replace(/\\x2E/, selector);
                // Years
                var yearRange = inst.get('yearRange');
                if (yearRange == 'any') {
                    selector = '<select class="' + this._monthYearClass + ' ' + this._anyYearClass +
				'" title="' + inst.get('yearStatus') + '">' +
				'<option>' + year + '</option></select>' +
				'<input class="' + this._monthYearClass + ' ' + this._curMonthClass +
				month + '" value="' + year + '">';
                }
                else {
                    yearRange = yearRange.split(':');
                    var todayYear = $.datepick.today().getFullYear();
                    var start = (yearRange[0].match('c[+-].*') ? year + parseInt(yearRange[0].substring(1), 10) :
				((yearRange[0].match('[+-].*') ? todayYear : 0) + parseInt(yearRange[0], 10)));
                    var end = (yearRange[1].match('c[+-].*') ? year + parseInt(yearRange[1].substring(1), 10) :
				((yearRange[1].match('[+-].*') ? todayYear : 0) + parseInt(yearRange[1], 10)));
                    selector = '<select class="' + this._monthYearClass +
				'" title="' + inst.get('yearStatus') + '">';
                    start = $.datepick.add($.datepick.newDate(start + 1, 1, 1), -1, 'd');
                    end = $.datepick.newDate(end, 1, 1);
                    var addYear = function(y) {
                        if (y != 0) {
                            selector += '<option value="' + month + '/' + y + '"' +
						(year == y ? ' selected="selected"' : '') + '>' + y + '</option>';
                        }
                    };
                    if (start.getTime() < end.getTime()) {
                        start = (minDate && minDate.getTime() > start.getTime() ? minDate : start).getFullYear();
                        end = (maxDate && maxDate.getTime() < end.getTime() ? maxDate : end).getFullYear();
                        for (var y = start; y <= end; y++) {
                            addYear(y);
                        }
                    }
                    else {
                        start = (maxDate && maxDate.getTime() < start.getTime() ? maxDate : start).getFullYear();
                        end = (minDate && minDate.getTime() > end.getTime() ? minDate : end).getFullYear();
                        for (var y = start; y >= end; y--) {
                            addYear(y);
                        }
                    }
                    selector += '</select>';
                }
                html = html.replace(/\\x2F/, selector);
                return html;
            },

            /* Prepare a render template for use.
            Exclude popup/inline sections that are not applicable.
            Localise text of the form: {l10n:name}.
            @param  text  (string) the text to localise
            @param  inst  (object) the current instance settings
            @return  (string) the localised text */
            _prepare: function(text, inst) {
                var replaceSection = function(type, retain) {
                    while (true) {
                        var start = text.indexOf('{' + type + ':start}');
                        if (start == -1) {
                            return;
                        }
                        var end = text.substring(start).indexOf('{' + type + ':end}');
                        if (end > -1) {
                            text = text.substring(0, start) +
						(retain ? text.substr(start + type.length + 8, end - type.length - 8) : '') +
						text.substring(start + end + type.length + 6);
                        }
                    }
                };
                replaceSection('inline', inst.inline);
                replaceSection('popup', !inst.inline);
                var pattern = /\{l10n:([^\}]+)\}/;
                var matches = null;
                while (matches = pattern.exec(text)) {
                    text = text.replace(matches[0], inst.get(matches[1]));
                }
                return text;
            }
        });

        /* jQuery extend now ignores nulls!
        @param  target  (object) the object to extend
        @param  props   (object) the new settings
        @return  (object) the updated object */
        function extendRemove(target, props) {
            $.extend(target, props);
            for (var name in props)
                if (props[name] == null || props[name] == undefined)
                target[name] = props[name];
            return target;
        };

        /* Attach the datepicker functionality to a jQuery selection.
        @param  command  (string) the command to run (optional, default 'attach')
        @param  options  (object) the new settings to use for these instances (optional)
        @return  (jQuery) for chaining further calls */
        $.fn.datepick = function(options) {
            var otherArgs = Array.prototype.slice.call(arguments, 1);
            if ($.inArray(options, ['getDate', 'isDisabled', 'isSelectable', 'options', 'retrieveDate']) > -1) {
                return $.datepick[options].apply($.datepick, [this[0]].concat(otherArgs));
            }
            return this.each(function() {
                if (typeof options == 'string') {
                    $.datepick[options].apply($.datepick, [this].concat(otherArgs));
                }
                else {
                    $.datepick._attachPicker(this, options || {});
                }
            });
        };

        /* Initialise the datepicker functionality. */
        $.datepick = new Datepicker(); // singleton instance

        $(function() {
            $(document).mousedown($.datepick._checkExternalClick).
		resize(function() { $.datepick.hide($.datepick.curInst); });
        });

    })(jQuery);
